Matching the Nagy-Soper parton shower at next-to-leading order

Abstract

We present an MC@NLO-like matching of next-to-leading order QCD calculations with the Nagy-Soper parton shower. An implementation of the algorithm within the HELAC-DIPOLES Monte Carlo generator is used to address the uncertainties and ambiguities of the matching scheme. First results obtained using the Nagy-Soper parton shower implementation in DEDUCTOR in conjunction with the HELAC-NLO framework are given for the pp -> top anti-top j + X process at the LHC with sqrt(s)=8 TeV. Effects of resummation are discussed for various observables.

arXiv comment53 pages, 18 figures, 3 tables. References and a few typos corrected, acknowledgments added, dependence on the variation of the starting shower time corrected, version to appear in JHEP

References in corpus (70)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• The anti-k_t jet clustering algorithm
• A Brief Introduction to PYTHIA 8.1
• Parton distributions for the LHC
• A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX
• A New Method for Combining NLO QCD with Shower Monte Carlo Algorithms
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• Herwig++ Physics and Manual
• HERWIG 6.5: an event generator for Hadron Emission Reactions With Interfering Gluons (including supersymmetric processes)
• Matching NLO QCD computations and parton shower simulations
• A General Algorithm for Calculating Jet Cross Sections in NLO QCD
• A parton shower algorithm based on Catani-Seymour dipole factorisation
• Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions
• Three-jet cross sections to next-to-leading order
• Merging meets matching in MC@NLO
• Matching matrix elements and shower evolution for top-quark production in hadronic collisions
• The Dipole Formalism for Next-to-Leading Order QCD Calculations with Massive Partons
• A critical appraisal of NLO+PS matching methods
• Matching NLO QCD and parton showers in heavy flavour production
• Next-to-leading order calculation of three-jet observables in hadron-hadron collision
• Transverse-momentum resummation and the spectrum of the Higgs boson at the LHC
• A standard format for Les Houches Event Files
• NLO Higgs boson production via gluon fusion matched with shower in POWHEG
• NLO QCD corrections to t tbar + jet production at hadron colliders
• Helac-nlo
• Automated one-loop calculations: a proof of concept
• A simple shower and matching algorithm
• Production of Drell--Yan lepton pairs in hadron collisions: transverse-momentum resummation at next-to-next-to-leading logarithmic accuracy
• Next-to-leading order calculation of four-jet observables in electron-positron annihilation
• Coherent Parton Showers with Local Recoils
• Parton showers with quantum interference
• Polarizing the Dipoles
• Dipole Showers and Automated NLO Matching in Herwig++
• Hadronic top-quark pair-production with one jet and parton showering
• NLO QCD corrections to top quark pair production in association with one hard jet at hadron colliders
• Resummed event shapes at hadron-hadron colliders
• Hadronic top-quark pair production in association with a hard jet at next-to-leading order QCD: Phenomenological studies for the Tevatron and the LHC
• Automating the POWHEG method in Sherpa
• Matching Parton Showers to NLO Computation
• Subleading Nc improved Parton Showers
• Squark and Gluino Production with Jets
• Resummed event-shape variables in DIS
• Parton showers with quantum interference: leading color, with spin
• Parton showers from the dipole formalism
• Next-to-leading order QCD predictions for top-quark pair production with up to two jets merged with a parton shower
• Uncertainties in NLO + parton shower matched simulations of inclusive jet and dijet production
• A parton shower based on factorization of the quantum density matrix
• Matching NLO QCD computations with PYTHIA using MC@NLO
• Antenna Showers with One-Loop Matrix Elements
• Top quark pair production in association with a jet with NLO parton showering
• Parton shower evolution with subleading color
• Complete Nagy-Soper subtraction for next-to-leading order calculations in QCD
• Antenna Showers with Hadronic Initial States
• Resummation of the jet broadening in DIS
• On the transverse momentum in Z-boson production in a virtuality ordered parton shower
• Parton showers with quantum interference: leading color, spin averaged
• aMC@NLO predictions for Wjj production at the Tevatron
• Timelike Dipole-Antenna Showers with Massive Fermions
• The effect on PDFs and ${\alpha }_S(M_Z^2)$ due to changes in flavour scheme and higher twist contributions
• Next-to-leading order QCD calculations with parton showers I: collinear singularities
• Next-to-leading order QCD jet production with parton showers and hadronization
• Next-to-leading order QCD calculations with parton showers II: soft singularities
• An alternative subtraction scheme for next-to-leading order QCD calculations
• Ordering variable for parton showers
• Final state dipole showers and the DGLAP equation
• Parton distribution functions in the context of parton showers
• Nagy-Soper subtraction scheme for multiparton final states
• Nagy-Soper subtraction: a review

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• Top Quark Pair Production in Association with a Jet with NLO QCD Off-Shell Effects at the Large Hadron Collider
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• $t\bar{t}b\bar{b}$ at the LHC: On the size of off-shell effects and prompt $b$-jet identification
• A study of additional jet activity in top quark pair production and decay at the LHC
• Complete NLO corrections to top-quark pair production with isolated photons
• Associated production of a top-quark pair with two isolated photons at the LHC through NLO in QCD
• $\mathcal{C}\mathcal{P}$ structure of the top-quark Yukawa interaction: NLO QCD corrections and off-shell effects
• Four top final states with NLO accuracy in perturbative QCD: 4 lepton channel
• Effects of subleading color in a parton shower
• Four top final states with NLO accuracy in perturbative QCD: 3 lepton channel
• NLO QCD predictions for off-shell $t\bar{t}W$ production in association with a light jet at the LHC
• Summary of the Topical Workshop on Top Quark Differential Distributions 2014
• Sector-improved residue subtraction: Improvements and Applications
• Complete NLO corrections to off-shell $\mathbf{t}\bar{\mathbf{t}}$ production in the $\mathbf{\ell }+\mathbf{j}$ decay channel
• Recent developments in Monte-Carlo Event Generators
• Automated NLO/NLL Monte Carlo programs for the LHC
• Off-shell $t\bar{t}j$ production and top quark mass studies at the LHC
• Inclusive and differential measurements of the $\mathrm{t}\bar{\mathrm{t}}\gamma$ cross section and the $\mathrm{t}\bar{\mathrm{t}}\gamma$ / $\mathrm{t}\bar{\mathrm{t}}$ cross section ratio in proton-proton collisions at $\sqrt{s}$ = 13 TeV